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Finding the Fourth Proportional to 1,371.42, 2,056.55 and 446.67

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Solution

The fourth proportional to 1,371.42, 2,056.55 and 446.67 is: 669.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,371.42 : 2,056.55 = 446.67 : x
  2. Step 2: Convert to fraction form
    1,371.42/2,056.55 = 446.67/x
  3. Step 3: Cross multiply
    1,371.42x = 2,056.55 × 446.67
  4. Step 4: Simplify right side
    1,371.42x = 918,596.96
  5. Step 5: Solve for x
    x = 918,596.96/1,371.42
  6. Step 6: Final answer
    x = 669.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.